There is n o multiplier, so you'll need another machine to be able TIGHTEN all 4 nuts. What you're doing is dividing the torque between the resistors, in this case, the nuts. To put it simple, you'll need 4 times the amount of strength that is needed to tighten ONE nut.
Hello, my name is Carlos and I am in Brazil (state of São Paulo, region of Campinas) I saw your publication on "sobre sua publicicação" on "RU-vid" and I really enjoyed your project. I would like to build this your project, you can provide more details to build this system. I appreciate your attention.